#pragma once 
#include<iostream>
#include<string>
#include<unistd.h>
#include<cstring>
#include<sys/types.h>
#include<sys/stat.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<netinet/in.h>
#include"Log.hpp"

enum
{
    SocketErr = 2,
    BindErr,
    ListenErr 
};

const int backlog = 10;
class Sock 
{
public:
    Sock() {}

    ~Sock() {}

public:
    void Socket()
    {
        sockfd_ = socket(AF_INET, SOCK_STREAM, 0);
        if(sockfd_ < 0)
        {
            lg(Fatal, "socket error, %s : %d", strerror(errno), errno);
            exit(SocketErr); 
        }

        int opt = 1;
        setsockopt(sockfd_, SOL_SOCKET, SO_REUSEADDR|SO_REUSEPORT, &opt, sizeof(opt)); 
    }

    void Bind(uint16_t port)
    {
        struct sockaddr_in local;
        memset(&local, 0, sizeof(local));
        local.sin_family = AF_INET;
        local.sin_port = htons(port);
        local.sin_addr.s_addr = INADDR_ANY;

        if(bind(sockfd_, (struct sockaddr*)&local, sizeof(local)) < 0)
        {
            lg(Fatal, "bind error, %s : %s", strerror(errno), errno); 
        }
    }

    void Listen()
    {
        if(listen(sockfd_, backlog) < 0)
        {
            lg(Fatal, "listen errno, %s : %d", strerror(errno), errno); 
            exit(ListenErr);
        }
    }

    int Accept(std::string *clientip, uint16_t *clientport)
    {
        struct sockaddr_in peer;
        socklen_t len = sizeof(peer);
        int newfd = accept(sockfd_, (struct sockaddr*)&peer, &len);
        if(newfd < 0)
        {
            lg(Warning, "accept error, %s :%d", strerror(errno), errno);
            return -1; 
        }
        char ipstr[64];
        inet_ntop(AF_INET, &peer.sin_addr, ipstr, sizeof(ipstr));
        *clientip = ipstr;
        *clientport = ntohs(peer.sin_port);
        return newfd; 
    }

    bool Connect(const std::string &ip, const uint16_t &port)
    {
        struct sockaddr_in peer;
        memset(&peer, 0, sizeof(peer));
        peer.sin_family = AF_INET;
        peer.sin_port = htons(port);
        inet_pton(AF_INET, ip.c_str(), &(peer.sin_addr)); 

        int n = connect(sockfd_, (struct sockaddr*)&peer, sizeof(peer)); 

        if(n == -1)
        {
            std::cerr << "connect to " << ip << ":" << port << " error " << std::endl; 
            return false; 
        }
        return true; 
    }

    void Close()
    {
        close(sockfd_); 
    }

    int Fd()
    {
        return sockfd_;
    }

private:
    int sockfd_; 
};
